fix isComparisonFilter

geostyler · Feb 21, 2022 · a21e83b · a21e83b
1 parent 9b86b25
commit a21e83b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/typeguards.ts b/typeguards.ts
@@ -72,7 +72,7 @@ export const isFilter = (got: any): got is Filter => {
     isNegationFilter(got);
 };
 export const isComparisonFilter = (got: any): got is ComparisonFilter => {
-  const expectedLength = got[0] === '<=x<=' ? 4 : 3;
+  const expectedLength = got && got[0] === '<=x<=' ? 4 : 3;
   return Array.isArray(got) &&
     got.length === expectedLength &&
     isComparisonOperator(got[0]) &&